JPAUtil.java

package br.com.dilneicunhaweblog.model.usefull;

import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

/**
 * @author Dilnei
 *
 * Classe responsavel por fornecer as instâncias do Entity Manager. Quando a CDI
 * precisar criar o Objeto ela utilizará o método com
 * @Produces
 */
public class JPAUtil {

    private static final EntityManagerFactory emf = Persistence.createEntityManagerFactory("weblogPU");

    @RequestScoped
    @Produces
    public EntityManager getEntityManager() {
        return emf.createEntityManager();
    }

    // Recebe uma Entity Manager e faz o seu fechamento(@Disposes(ela sera descartada através desta annotation)).
    public void close(@Disposes EntityManager em) {
        em.close();
    }
}